St. Petersburg mathematical Olympiads. 2009-2021. Ed. Kokhas K.P., Fomin D.V.

The book contains the tasks of St. Petersburg mathematical Olympiads 2009–2021. With answers and decisions. All tasks require ingenuity, quick wits, and sometimes many hours of thought. The introduction tells about the history and organization of Leningrad (St. Petersburg) mathematical olympiads.

The thematic rubricator is given for the convenience of work.

The book is intended for schoolchildren of middle and senior classes, leaders of circles, teachers Mathematics. It will be interesting to all lovers of beautiful mathematical tasks. This collection can also be used to prepare for high -level mathematical competitions.